Method of making explosive devices



Oct. 6, 1936. A. FABRIZIO I 2,056,509 7 METHOD OF MAKING EXPLOSIVE DEVICES Fild Jan. 17, 1934 GO CC) C), O r 0 o 000 0 Eiqi ' INVENTOR:

flchillo Fabnizio A TTORNEY Patented Oct. 6, 1936 f UNITED sn't ATENT OFFIQE METHOD OF MAKING EXPLOSIVE i DEVICES H invention relates-tothe method of making explosive devices,-and has for an object to provide a method whereby explosive devices; such as torpedoes, salutes and othersimilar articles, may

be madeqrapidly, efficiently and economically.

A further object of the invention is to provide amethodwhereby short lengths of tubing are sealed atboth endsenclosing an explosive or .detonating charger a A further object of the inventionisto provide a method wherein short lengths of tubing are employed and filled with a granular or comminuted material, as thin layer at one end and impregnated with a cementitious material, after which the explosive or detonating charge is introduced in an improved manner, and finally sealed at the Opposite end by-a cementitious ma- ;terial. I i l L;

A further object of the invention is to provide a frame in which great number of short lengths of;tubing may-begarranged, separated by separating strips, with one open end of each tube section upwardly in position to receive granular or comminuted material spread evenly over the entire surface, after which the granular material is impregnated by a cementitious material which, when dried, coagulated or crystallized, forms a rigid bottom to the tube section, then employing a device including a number of spoons equal to each row of the tube sections for introducing into the tube sections of one row simultaneously the explosive or detonating charge, and finally sealing the end over the detonating or explosive charge by a cementitious material which, when dried or otherwise hardened, forms a complete closure for the explosive or detonating charge which resists internal pressure to such an extent as to result in a loud detonation.

The invention, therefore, comprises the employment of a frame with a bottom board therein in which are arranged in rows a large number of tube sections, such for instance as tubes made from paper or pulp, the rows being separated by separators, then introducing a granular or comminuted material, such as sand, into the open top ends of the tube sections, by sifting or otherwise, then introducing into the tubes a cementitious material, such as a silicate compound, which may be introduced by means of a flexible tubing connected with a reservoir and manually passed along the several rows successively, drying or hardening the cementitious material, introducing into the tubes an explosive or detonating charge of any preferred or appropriate nature by the employment of a device including a rod having extending therefrom arms, at the end of which armsare spoons of the correct capacity for the detonating orexplosive charge, and equal in number to the tube, sections in a single row,

filling all of said tube sections by the use of said tary types of devices for carrying out the method, 15

and wherein Figure l is a top plan view of a fragment of the frame with a number of tube sections and separators therein,

Figure 2 is a view sideelevation of a filled. frame, andwabove such frame a sieve indicating the sifting of granular or comminuted material from such sieve over the area of the frame, and, therefore, into the open top ends of the tube sections,

Figure 3 is a plan view of the spoon device,

Figure 4 is a view in elevation of a device which may be employed for introducing cementitious material, and

Figure 5 is a perspective view of one of the tube sections.

Like characters of reference indicate corresponding parts throughout the several views.

In carrying out the present invention, tube sections ID are first produced in great numbers and are manually or otherwise arranged within a frame ll upon a supporting board 12 in rows, as indicated at Figure 1, the rows being separated by separating strips I3.

The number of tube sections thus employed will depend upon the size of the frame, which may be any size desired, whereby the number of tube sections employed may be practically unlimited, and, therefore, more or less than indicated in the drawing.

The separated rows of tube sections are now ready for further processing. The first step is the introduction into the tube sections of a granular or comminuted material. This may be brought about in any approved manner. At Figure 2, a sieve I4 is shown indicating the sifting of granular material l5 over the top open ends of the tube sections. This material so sifted may vary greatly. It has been found that dry sand serves the purpose admirably, and is, of course,

terial may be introduced into the tubesin any manner to result in substantial uniformity.

Upon the granular material now occupying a position in the bottom of the tube sections a cementitious material is introduced. This may also vary greatly according to circumstances, but a silicate compound has been found to serve the purpose admirably, and is, therefore, suggested as the preferred cement. This may be introduced into the tube sections uponand'to inrpregnate the contained granular material in any manner found convenient. V q V g At Figure 4; the reservoirjlfi is shown having ed to drain the contents of the reservoir. It is found convenient in the use offthis deviceito support or suspend the reservoir in any approved 7 manner and to manually tr'a'ce along each' -row oftub'e sections withtbe end of'the flexible tube 1 discharging the cementitious material into the tubesections. With some experience of the operator, this may be done with great uniformity.

'After the-cementitious material has hardened, it

will be found tohave'impregna'ted the granular -material and therewith to have formed arigid closure for thelower ends of the tube sections.

The 'next step is the introduction of the explo's'ive"ondetdhating materiaLTThis may also be done in an y" approved mann but for conven- .35' ien'ce and'spe'ed a device,'such as shown at Figure 3, is preferably employed. This comprises a 'rodfl8 having extending therefrom a 'plu'rality of V farms I9, each of which is provided at its end with aspoon of "the capacity required to supply the desired explosive or detonating charge." The device is employed by dipping the spoons simultaneously into a mound of the det'onatin g or consisting in arranging-a plurality of rows of constrained open endedtube sections separating tidhsfintroducing a cementitious material onto mentitious material to the top. This may be done 10 by employing the device shown at Figure 4, and in the same manner previously outlined. The hardening of this cementitious material completes the article in accordance with the present 'method. Of course, the article when so com- 15 pleted may be further employed by coating or i v V covering in any manner. If the device as an en-' a flexible tube l1 connected'therewith, and adapteach tube section and cemented therein by the last applicaiton of the cementitious material.

I claim:' 7 The method of producing an explosive article said rows by separating strips, sifting granular material over the top of the tube sections to enter therein and fall to the bottomof said secthe granular material by directing a stream along each row seriallywhereby upon hardening the granular and cementitious material forms a 'cap for one end of the tube, introducing upon the hardened cementitious material a charge simultaneously into each section of a row, and completing by serially directing cementitious ma- ACHILLO FABRIZIO. 

